What’s Vulnerable › Vulnerabilities

CVE-2020-5757

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-07-17 · updated 2026-06-17
• Weakness: CWE-78

Description

Grandstream UCM6200 series firmware version 1.0.20.23 and below is vulnerable to OS command injection via HTTP. An authenticated remote attacker can bypass command injection mitigations and execute commands as the root user by sending a crafted HTTP POST to the UCM's "New" HTTPS API.

Affected products

• Grandstream Ucm6202 Firmware: through 1.0.20.23
• Grandstream Ucm6204 Firmware: through 1.0.20.23
• Grandstream Ucm6208 Firmware: through 1.0.20.23

References

• https://www.tenable.com/security/research/tra-2020-42
• https://www.tenable.com/cve/CVE-2020-5757
• https://www.tenable.com/security/research/tra-2020-42

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